Custom Validation Only on Register Form ?

Hi,

I have created a function that checks if the user is over 18 years old.
If not, registration is not allowed.

I implemented this using the custom validation method you provided in the documentation: https://www.cozmoslabs.com/docs/profile-builder-2/developers-knowledge-base/custom-fields/add-extra-validation-to-a-custom-field/

It woks but I encountered an issue. : This validation is applied to all birthdate fields on my website instead of just the registration form.

Is there a way to apply this validation specifically to the registration form?

/*

* Custom Birth Date Validation

*/

/* handle field validation */

add_filter('wppb_check_form_field_datepicker', 'wppbc_custom_birthdate_validation', 20, 4);

function wppbc_custom_birthdate_validation($message, $field, $request_data, $form_location)

{

if ($field['field'] == 'Datepicker' && $field['meta-name'] == 'birthdate') {

if (isset($request_data[$field['meta-name']]) && trim($request_data[$field['meta-name']]) != '') {

$birthdate = DateTime::createFromFormat('d/m/Y', $request_data[$field['meta-name']]);

if ($birthdate === false) {

return 'Invalid birth date format.';

}

$now = new DateTime();

$interval = $now->diff($birthdate);

$age = $interval->y;

if ($age < 18) {

$locale = get_locale();

$lang = substr($locale, 0, 2);

$ageOfKid = "As you are under 18, one of your parents must create an account and then add you as a child from his account.";

if ($lang == "de") {

$ageOfKid = "Da du unter 18 Jahre alt bist, muss einer deiner Eltern ein Konto erstellen und dich dann als Kind von ihrem Konto aus hinzufügen.";

} elseif ($lang == "fr") {

$ageOfKid = "étant donné que vous avez moins de 18 ans, l'un de vos parents doit créer un compte puis vous ajouter en tant qu'enfant à partir de son compte.";

}

return $ageOfKid;

}

}

if ((isset($request_data[$field['meta-name']]) && (trim($request_data[$field['meta-name']]) == '')) && ($field['required'] == 'Yes')) {

return wppb_required_field_error($field["field-title"]);

}

}

return $message;

}